Kev tsim qauv ntawm cov ntsuas tsis pub tawm ntawm cov duab kos thiab ntawm cov khoom siv lawv tus kheej tau ua raws li ntau cov qauv. Ntxiv rau, qee qhov resistors siv cov xim sib tshooj hloov cov lej rau encode tus lej.
Cov Lus Qhia
Kauj ruam 1
Hauv daim duab hluav taws xob, qhov tsis kam ntawm lub resistor, muab yam tsis qhia txog qhov ntsuas ntawm qhov ntsuas txhua, yog qhia nyob rau hauv ohms. Piv txwv li, 200 txhais tau tias 200 ohms. Yog tias tom qab cov lej ntawv muaj tus tsiaj ntawv qis k, peb tab tom tham txog kilo-ohms: 250 k txhais tau tias 250 kOhm. Yog hais tias ntawm cov txheej txheem qub tsis muaj qhov ntsuas ntawm kev ntsuas hauv kev tsim, thiab tus lej muaj qhov zoo ib feem nyob ntxiv nrog rau feem ntu, qhov denomination yog qhia hauv megaohms: 10, 0 sawv rau 10 MOhm. Hauv kev ncig dua tshiab siv peev M rau qhov no: 5 M txhais tau hais tias 5 MΩ. Tus tsiaj ntawv G hloov chaw ntawm kev ntsuas ntsuas Gohm (gigaohm). Xws li cov resistors tsis tshua muaj, feem ntau hauv ionization chamber raws dosimetry cov khoom.
Kauj ruam 2
Ntawm lub resistors lawv tus kheej, tsis txhob xaiv lub npe ntawm chav tsev Ohm, tsis hais lub peev Latin tsab ntawv R lossis tsab ntawv capital letter (omega) siv. Kilo-ohms raug txhais los ntawm tsab ntawv muaj peev txheej K, mega-ohms - los ntawm tsab ntawv peev M, gigaomas - los ntawm cov tsiaj ntawv Lavxias G lossis Latin G. Cov lej nyob tsis yog ua ntej, tab sis tom qab tsab ntawv, yog sib npaug nrog cov lej tom qab zauv tshooj. Piv txwv, 2R5 - 2.5 Ohm, 120K - 120 kΩ, 4M7 - 4.7 MΩ. Tsawg dua feem ntau, tus nqi tsis kam yog qhia siv feem lees txais kev tsim qauv, piv txwv li, 10 kΩ.
Kauj ruam 3
Cov lej sib txawv yog cim nrog cov xim sib dhos ntawm cov resistors. Cov xim siv yog raws li nram no: dub - 0, xim av - 1, liab - 2, txiv kab ntxwv - 3, daj - 4, ntsuab - 5, xiav - 6, ntshav - 7, grey - 8, dawb - 9. Muaj tau peb lossis plaub. Tag nrho cov ntawm lawv, tshwj tsis yog rau tus kawg, cim tus lej, thiab tom kawg - tus lej xoom tom qab cov naj npawb no. Tus lej tawm hais tawm qhov tsis kam nyob rau hauv ohms, uas tuaj yeem hloov mus rau cov koog uas yooj yim dua.
Kauj ruam 4
Yog tias muaj xim daj tom qab lawv dhau los ntawm qhov sib txawv me me, tus tiv taus muaj qhov thev taus ntawm 5%. Lub thawv nyiaj ntsuab qhia tau tias lub siab tsis kam ntawm 10%, thiab yog tias tsis muaj hlo li, qhov thev taus rau tiv taus yog 20%. Suav cov kab txaij ntawm ib sab sab nraud rau cov kab txaij cim lub thev taus.
Kauj ruam 5
Rau lub resistor uas tsis muaj qauv, qhov ua hauj kuj tuaj yeem ntsuas. Txhawm rau ua qhov no, de-energize hauv Circuit Court, tso tawm ntawm lub capacitors, nco ntsoov nrog voltmeter hais tias lawv tau tawm lawm tiag, thiab tom qab ntawd unsolder ib lub davhlau ya nyob twg ntawm lub resistor thiab txuas ib qho ohmmeter rau nws. Xaiv cov kev txwv ntawm qhov twg cov kev tawm tsam tau tshwm sim feem ntau yog. Tom qab nyeem ntawv nyeem tas, tshem tawm ntawm ohmmeter thiab cam cov disconnected lead rov qab.
